ADS7846N/2K5G4

Overview

The ADS7846N/2K5G4 is a resistive touch screen controller manufactured by Texas Instruments. It integrates a 12-bit analog-to-digital converter (ADC) and operates on a single power supply ranging from 2.2 V to 5.25 V. The device supports serial communication via SPI or a 3-wire interface, enabling efficient data transfer with microcontrollers. Key electrical specifications include a sampling rate of 125 kS/s and a typical operating current of 280 µA. It functions within an industrial temperature range of -40°C to +85°C and is housed in a TSSOP-16 surface-mount package.

Feature Summary

• 12-bit resolution ADC for precise coordinate detection
• Serial interface compatible with SPI and 3-wire protocols
• Low power consumption with 280 µA operating current
• Industrial temperature range operation (-40°C to +85°C)

Applications

• Resistive touch screen controllers in industrial HMI panels
• Portable medical devices requiring low power consumption
• Consumer electronics with 4-wire resistive displays

Procurement Notes

Verify the RoHS compliance status and specific packaging configuration when ordering. Confirm that the suffix 'G4' aligns with the required lead-free specifications for the target assembly process. Check for any discontinuation notices or lifecycle changes associated with this specific part number variant before finalizing procurement plans.

Selection Notes

Select this component for applications requiring high-resolution coordinate tracking with minimal power usage. Ensure the host system supports either SPI or 3-wire serial interfaces. Verify that the supply voltage falls within the 2.2 V to 5.25 V range and that the operating environment stays within the specified temperature limits.

Part Context

This part belongs to the ADS7846 family of touch screen controllers from Texas Instruments. It serves as a specialized solution for converting analog touch signals into digital data. The N/2K5G4 designation indicates a specific tape-and-reel packaging option with lead-free construction, distinguishing it from tube-packaged or non-green variants.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the ADS7846E/2K5 and ADS7846IGQR. When replacing, verify that the alternative package type matches the PCB footprint and that the electrical characteristics remain within acceptable tolerances for the application.